Genius GEN5X1, 1-Bank, 5A (5A/Bank) Smart Marine Battery Charger, 12V Waterproof Onboard Boat Charger, Maintainer and Desulfator for AGM, Lithium (LiFePO4) and Deep-Cycle Batteries | Charges 1 Battery at Once, IP68 Waterproof, Overcharge Protection, Temperature Compensation, For Lead-Acid & Lithium

They don't fit Australian plugs without a adapter great unit but the plugs let them down you should not have to rewire for our plugs the company is very shot sighted on this matter

Very nice product good quality.

Is a solid product and it’s waterproof.

I was skeptical at first because there are so many battery chargers/maintainers out there, but after using NOCO Genius chargers for a while, I’m genuinely impressed. I now own FOUR of them. I started with the NOCO Genius 1 for my Kawasaki SxS. It worked so well that I bought a second Genius 1 for my mom’s vehicle. Since then, I’ve added a Genius 2 for my own vehicle and a Gen5 X1 waterproof onboard charger for our boat. Everything about these chargers feels premium. The packaging is excellent, the cables are thick and durable, the LED indicators are bright and easy to see even across the garage during the day, and even the small details stand out — like the rubber feet on the bottom so the unit doesn’t scratch your toolbox or workbench. The Genius Cable Extension accessory has been AMAZING. No more struggling with clamps or leaving vehicle hoods open. Once the extension is attached to the battery posts, you simply plug the charger into the quick connect and you’re done. Super clean setup and extremely convenient. One of my favorite features is the memory setting. Once you select the battery type/mode, the charger remembers it even after being unplugged for a while. That’s incredibly useful after a power outage or if you move the charger around. I also really appreciate the thermal protection and smart charging features. During a 100+ degree day in my garage, I actually watched the charger reduce/pause charging to protect the battery from heat. Heat destroys batteries, so seeing the charger actively monitor conditions gave me a lot of confidence. I tested the maintainer function as well. Once the battery reached full charge, the indicator stayed green. Then I opened the doors and turned on the parking lights to create a battery draw. Within minutes, the NOCO detected the voltage drop and automatically started charging again. That’s exactly what you want from a smart maintainer. My personal thoughts on the models: Genius 1: Perfect for motorcycles, ATVs, UTVs, SxS, or vehicles that sit for long periods. Genius 2: Faster charging and better/more detailed status indicators. Gen5 X1: Excellent for marine applications since it’s waterproof and designed as a permanent onboard charger. Yes, these cost more than some cheaper chargers, but in my opinion, you absolutely get what you pay for. They don’t overcharge batteries, they intelligently monitor and maintain them, and the overall build quality is excellent. After owning four of them, my only regret is not buying them sooner.

Bought this for an onboard maintainer in a diesel pickup. Mounted it on the ledge above the brake fluid reservoir with 3 M heavy duty outdoor velcro. Close to the battery and rock solid. This velcro has adhesive that rivals super glue. Be sure you have it where you want it the first time. ( ask me how I know). Ran the wiring in semi rigid loom and connected the ring terminals to the battery bar. Plenty of wire included ( 6 feet each for power and battery wires) . Connected the power cord to a waterproof external receptacle mounted under the vehicle's bumper. Works great, fully automatic. Returns to your last setting for battery type. No need to open the hood and select battery type each time you plug it in. For the quality, it's a bargain. Short trips or long periods of storage in a diesel are hard on batteries and they're expensive. This maintainer is cheap insurance. I plug it in about once a week and it takes about 2 hours to top off the batteries. It balances the parallel batteries perfectly, both at 12.7 volts when finished.